多项选择题
A.Protecting the business from information outages
B.Optimizing the efficiency with which IT operates
C.An increased need for specialized IT silos
D.IT systems grow fast
单项选择题 What is a benefit of Internet protocol (IP) telephony?（）
单项选择题 A global manufacturer of automobile parts wants to implement specialized voice applications to increase productivity and reduce the cost of overseas toll calls. Which Cisco solution best matches this business need?（）
单项选择题 Which Internet Protocol(IP) telephony element is best categorizedas a voice application component?（）